We present the first application of the weighted skew-spectra to analyze non-Gaussian information in galaxy survey data. Using the tree-level galaxy skew-spectra together with the one-loop power spectrum multipoles, we analyze the Sloan Digital Sky Survey (SDSS)-III Baryon Oscillation Spectroscopic Survey (BOSS) galaxy clustering data, and target our search towards the equilateral bispectrum shape of primordial non-Gaussianity. We use the Effective Field Theory model for the galaxy power spectrum and bispectrum, and account for systematic effects, such as the survey geometry. From our likelihood analysis, we find fNLequil=−34−334+296 at 68% CL, consistent with previous works, while systematic errors from our treatment of the survey geometry lead to an unreliable estimation of fNLortho. We further constrain the bias and counterterm parameters, while keeping the cosmology fixed to Planck 2018 values. As a check, we also validate our analysis pipeline using the Nseries simulation suite.
@article{arxiv.2401.13036,
title = {Analysis of BOSS Galaxy Data with Weighted Skew-Spectra},
author = {Shu-Fan Chen and Priyesh Chakraborty and Cora Dvorkin},
journal= {arXiv preprint arXiv:2401.13036},
year = {2024}
}